Publications

1. Low-Threshold Optically Pumped Amplified Spontaneous Emission in Perovskite LEDs Enabled by Low-Loss Electrodes and Thick Charge Transport Layers. K. K. Bhowmik, X. Zhao, S. H. Foulger, H. Xiao, L. Zhu, L. Zhao. In preparation.

2. In-Situ Growth of Halide Perovskite Single Crystals and Thin Films on Optical Fiber End Facets. Y. Yu, K. K. Bhowmik, R. Li, K. Li, L. Zhu, H. Xiao, L. Zhao. Submitted.

3. Thermal Evaporation of Overlayers Induces Degradation of Metal Halide Perovskites. K. K. Bhowmik, D. Ma, B. Topper, K. Koehler, S. H. Foulger, H. Xiao, L. Zhu, L. Zhao. ACS Nano. Accepted.

4. Enhanced Amplified Spontaneous Emission from Optically Pumped Perovskite Light Emitting Diodes with Sodium Fluoride Additives. K. K. Bhowmik, Y. Wu, X. Zhao, T. Wanless, K. Roh, S. H. Foulger, L. Zhu, H. Xiao, L. Zhao. Advanced Photonics Research, 6, 2500025 (2025). 

5. Electrically Assisted Lasing in Metal Halide Perovskite Semiconductors. A. J. Grede, R. Cawthorn, L. Zhao, J. P. Murphy, K. Roh, K. Al Kurdi, S. Barlow, S. R. Marder, B. P. Rand, N. C. Giebink. ACS Photonics, 11, 1851 (2024).

6. Roadmap on Perovskite light-emitting diodes. Z. Chen, R. L. Z. Hoye, H.-L. Yip, N. Fiuza-Maneiro, I. López-Fernández, C. Otero-Martínez, L. Polavarapu, N. Mondal, A. Mirabelli, M. Anaya, S. Stranks, H. Liu, G. Shi, Z. Xiao, N. Kim, Y. Kim, B. Shin, J. Shi, M. Liu, Q. Zhang, Z. Fan, J. C. Loy, L. Zhao, B. P. Rand, H.Arfin, S. Saikia, A. Nag, C. Zou, L. Y. Lin, H. Xiang, H. Zeng, D. Liu, S.-J. Su, C. Wang, H. Zhong, T. Xuan, R.-J. Xie, C. Bao, F. Gao, X. Gao, C. Qin, Y.-H. Kim, M. Beard. J. Phys. Photonics, 6, 032501 (2024).

7. Metal Halide Perovskite Light-Emitting Devices for Optical Communications: A Spotlight on Speed, Brightness, Wavelength Tunability, Bidirectionality, and Integration. K. K. Bhowmik, L. Zhao. ACS Applied Electronic Materials. 6, 8558 (2024).

8. Toward nonepitaxial laser diodes. W.B. Gunnarsson, K. Roh, L. Zhao, J.P. Murphy, A.J. Grede, N.C. Giebink, B.P. Rand. Chemical Reviews, 123, 7548 (2023).

9. Thermal properties of polymer hole-transport layers influence the efficiency roll-off and stability of perovskite light-emitting diodes. L. Zhao, D.D. Astridge, W.B. Gunnarsson, Z. Xu, J. Hong, J. Scott, S. Kacmoli, K. Al Kurdi, S. Barlow, S.R. Marder, C.F. Gmachl, A. Sellinger, B.P. Rand. Nano Letters, 23, 4785 (2023).

10. Radiative pumping of exciton-polaritons in 2D hybrid perovskites. P. Deshmukh, L. Zhao, S. Satapathy, M. Khatoniar, B. Datta, B.P. Rand, V. Menon. Optical Materials Express, 13, 1655 (2023).

11. Nanosecond-Pulsed Perovskite Light-Emitting Diodes at High Current Density. L. Zhao, K. Roh, S. Kacmoli, K. A. Kurdi, S. Barlow, S. R. Marder, C. Gmachl, B. P. Rand. Advanced Materials, 33, 2104867 (2021).

12. Controlling microring resonator extinction ratio via metal halide perovskite nonlinearity. F. Wang, L. Zhao, Y. Xiao, T. Li, Y. Wang, A. Soman, H. Lee, T. Kananen, X. Hu, B. P. Rand, T. Gu. Advanced Optical Materials, 9, 2100783 (2021).

13. Roadmap on Organic-inorganic Hybrid Perovskite Semiconductors and Devices. L. Schmidt-Mende, V. Dyakonov, S. Olthof, F. Ünlü, K.M.T. Lê, S. Mathur, A.D. Karabanov, D.C. Lupascu, L.M. Herz, A. Hinderhofer, F. Schreiber, A. Chernikov, D.A. Egger, O. Shargaieva, C. Cocchi, E. Unger, M. Saliba, M.M. Byranvand, M. Kroll, F. Nehm, K. Leo, A. Redinger, J. Höcker, T. Kirchartz, J. Warby, E. Gutierrez-Partida, D. Neher, M. Stolterfoht, U. Würfel, M. Unmüssig, J. Herterich, C. Baretzky, J. Mohanraj, M. Thelakkat, C. Maheu, W. Jaegermann, T. Mayer, J. Rieger, T. Fauster, D. Niesner, F. Yang, S. Albrecht, T. Riedl, A. Fakharuddin, M. Vasilopoulou, Y. Vaynzof, D. Moia, J. Maier, M. Franckevičius, V. Gulbinas, R.A. Kerner, L. Zhao, B.P. Rand, N. Glück, T. Bein, F. Matteocci, L.A. Castriotta, A. Di Carlo, M. Scheffler, C. Draxl. APL Materials, 9, 109202 (2021). 

14. Tuning Laser Threshold within the Large Optical Gain Bandwidth of Halide Perovskite Thin Films. K. Roh, L. Zhao, B. P. Rand. ACS Photonics, 8, 2548 (2021).

15. Low Threshold Voltages Electrochemically Drive Gold Migration in Halide Perovskite Devices. R. A. Kerner, L. Zhao, S. Harvey, J. J. Berry, J. Schwartz, B. P. Rand. ACS Energy Letters, 5, 3352 (2020). 

16. Thermal Management Enables Bright and Stable Perovskite Light-Emitting Diodes. L. Zhao, K. Roh, S. Kacmoli, K. A. Kurdi, S. Jhulki, S. Barlow, S. R. Marder, C. Gmachl, B. P. Rand. Advanced Materials, 32, 2000752 (2020).

17. Optically Pumped Lasing from Hybrid Perovskite Light-Emitting Diodes. H. Kim, K. Roh, J. P. Murphy, L. Zhao, W. B. Gunnarsson, E. Longhi, S. Barlow, S. R. Marder, B. P. Rand, N. C. Giebink. Advanced Optical Materials, 8, 1901297 (2020).

18. Widely Tunable, Room Temperature, Single-Mode Lasing Operation from Mixed-Halide Perovskite Thin Films. K. Roh, L. Zhao, W. B. Gunnarsson, Z. Xiao, Y. Jia, N. C. Giebink, B. P. Rand. ACS Photonics, 6, 3331 (2019).

19. Improved Outcoupling Efficiency and Stability of Perovskite Light-Emitting Diodes Using Thin Emitting Layers. L. Zhao, K. M. Lee, K. Roh, S.-U.-Z Khan, B. P. Rand. Advanced Materials, 31, 1805836 (2019).

20. Reactions at Noble Metal Contacts with Methylammonium Lead Triiodide Perovskites: Role of Underpotential Deposition and Electrochemistry. R. A. Kerner, P. Schulz, J. Christians, S. Dunfield, B. Dou, L. Zhao, G. Teeter, J. Berry, B. P. Rand. APL Materials, 7, 041103 (2019).

21. Perovskite Light-Emitting Diodes with Improved Outcoupling Using a High-Index Contrast Nanoarray. S. Jeon, L. Zhao, Y. J. Jung, J. W. Kim, S. Kim, H. J.Kang, J. Jeong, B. P. Rand, J. Lee. Small, 15, 19000135 (2019).

22. Engineering Perovskite Nanocrystal Surface Termination for Light-Emitting Diodes with External Quantum Efficiency Exceeding 15%.   Z. Xiao, R. A. Kerner, N. Tran, L. Zhao, G. D. Scholes, B. P. Rand. Advanced Functional Materials, 29, 1807284 (2019).

23. Metal-Halide Perovskites: Emerging Light-Emitting Materials. L. Zhao, B. P. Rand. Information Display, 34, 18 (2018).

24. Hybrid Perovskite Light Emitting Diodes under Intense Electrical Excitation. H. Kim, L. Zhao, J. S. Price, A. J. Grede, K. Roh, A. N. Bridgeman, M. Lopez, B. P. Rand, N. C. Giebink. Nature Communications, 9, 4893 (2018).

25. Donor/Acceptor Charge-Transfer States at Two-Dimensional Metal Halide Perovskite and Organic Semiconductor Interfaces. L. Zhao, Y.L. Lin, H. Kim, N. C. Giebink, B. P. Rand. ACS Energy Letters, 3, 2708 (2018).

26. Ultrasensitive Heterojunctions of Graphene and 2D Perovskites Reveal Spontaneous Iodide Loss. L. Zhao, H. Tian, S. H. Silver, A. Kahn, T.-L. Ren, B. P. Rand. Joule, 2, 2133 (2018). 

27. Influence of Bulky Organo-Ammonium Halide Additive Choice on the Flexibility and Efficiency of Perovskite Light-Emitting Devices. L. Zhao, N. Rolston, K. M. Lee, X. Zhao, M. A. Reyes-Martinez, N. L. Tran, Y. Yeh, N. Yao, G. D. Scholes, Y. Loo, A. Selloni, R. H. Dauskardt, B. P. Rand. Advanced Functional Materials, 28, 1802060 (2018).

28. Extremely Low Operating Current Resistive Memory based on Exfoliated 2D Perovskite Single Crystals for Neuromorphic Computing.  H. Tian, L. Zhao, X. Wang, Y. Yeh, N. Yao, B. P. Rand, Tian-Ling Ren. ACS Nano, 11, 12247 (2017).

29. Mixed-Halide Perovskites with Stabilized Bandgaps. Z. Xiao, L. Zhao, N. L. Tran, Y. L. Lin, S. H. Silver, R. A. Kerner, N. Yao, A. Kahn, G. D. Scholes, B. P. Rand. Nano Letters, 17, 6863 (2017). 

30. Enhanced Outcoupling in Flexible Organic Light-Emitting Diodes on Scattering Polyimide Substrates. K. M. Lee, R. Fardel, L. Zhao, C. B. Arnold, B. P. Rand. Organic Electronics, 51, 471 (2017). 

31. Enhanced Sub-Bandgap Efficiency of a Solid-State Organic Intermediate Band Solar Cell Using Triplet-Triplet Annihilation. Y. L. Lin, M. Koch, A. N. Brigeman, D. M. E. Freeman, L. Zhao, H. Bronstein, N. C. Giebink, G. D. Scholes, B. P. Rand. Energy & Environmental Science, 10, 1465 (2017). 

32. Electrical Stress Influences the Efficiency of CH3NH3PbI3 Perovskite Light Emitting Devices. L. Zhao, J. Gao, Y. L Lin, Y. Yeh, K. M. Lee, N. Yao, Y. Loo, B. P. Rand. Advanced Materials, 29, 1605317 (2017).  

33. In Situ Preparation of Metal Halide Perovskite Nanocrystal Thin Films for Improved Light-Emitting Devices. L. Zhao, Y. Yeh, N. L. Tran, F. Wu, Z. Xiao, R. A Kerner, Y. L. Lin, G. D. Scholes, N. Yao, B. P. Rand. ACS Nano, 11, 3957 (2017).

34. Electronic Structure of the CsPbBr3/Polytriarylamine (PTAA) System. J. Endres, M. Kulbak, L. Zhao, B. P. Rand, D. Cahen, G. Hodes, A. Kahn. Journal of Applied Physics, 121, 035304 (2017).

35. Efficient Perovskite Light-Emitting Diodes Featuring Nanometre-sized Crystallites. Z. Xiao, R. A. Kerner, L. Zhao, N.L. Tran, K.M. Lee, T.-W. Koh, G.D. Scholes, B.P. Rand. Nature Photonics, 11, 108 (2017). 

36. Redox Chemistry Dominates the Degradation and Decomposition of Metal Halide Perovskite Optoelectronic Devices. L. Zhao, R. A. Kerner, Z. Xiao, Y. L. Lin, K. M. Lee, J. Schwartz, B. P. Rand. ACS Energy Letters, 1, 595 (2016).

37. Valence and Conduction Band Densities of States of Metal Halide Perovskites: A Combined Experimental–Theoretical Study. J. Endres, D. A. Egger, M. Kulbak, R. A. Kerner, L. Zhao, S.H. Silver, G. Hodes, B. P. Rand, D. Cahen, L. Kronik, A. Kahn. Journal of Physical Chemistry Letters, 7, 2722 (2016).

38. Ultrasmooth Metal Halide Perovskite Thin Films via Sol-Gel Processing. R. A. Kerner, L. Zhao, Z. Xiao, B. P. Rand. Journal of Materials Chemistry A, 4, 8308 (2016).

39. Mobility Enhancement of Strained GaSb P-Channel Metal Oxide Semiconductor Field-Effect Transistors with Biaxial Compressive Strain. Y.-W. Chen, Z. Tan, L. Zhao, J. Wang, Y.-Z. Liu, C. Si, F. Yuan, W.-H. Duan, Jun Xu. Chinese Physics B, 25, 038504 (2016).

40. GaSb P-Channel Metal-Oxide-Semiconductor Field-Effect Transistor and Its Temperature Dependent Characteristics. L. Zhao, Z. Tan, J. Wang, J. Xu. Chinese Physics B, 24, 018501 (2015).

41. Effects of Ozone Post Deposition Treatment on Interfacial and Electrical Characteristics of Atomic-layer-deposited Al2O3 and HfO2 Films on GaSb Substrates. L. Zhao, Z. Tan, J. Wang, J. Xu. Applied Surface Science, 289, 601 (2014).

42. Influence of Corner Effect on Performance of Three-Dimensional Tunnel Field-Effect Transistor. L. Liu, R. Liang, L. Zhao, J. Wang, J. Xu. Japanese Journal of Applied Physics, 53, 064304 (2014).

43. A small-signal Generator based on a Multi-layer Graphene/Molybdenum Disulfide Heterojunction. Z. Tan, H. Tian, T. Feng, L. Zhao, D. Xie, Y. Yang, L. Xiao, J. Wang, T.-L. Ren, J. Xu. Applied Physics Letters, 103, 263506 (2013).

44. Improved Properties of HfO2/Al2O3/GaSb MOS Capacitors Passivated with Neutralized (NH4)2S Solutions. Z. Tan, L. Zhao, J. Wang, J. Xu. ECS Solid State Letters, 2, P61 (2013).

45. Effects of Sulfur Passivation on GaSb Metal-oxide-semiconductor Capacitors with Neutralized and Unneutralized (NH4)2S Solutions of Varied Concentrations. L. Zhao, Z. Tan, R. Bai, N. Cui, J. Wang, J. Xu. Applied Physics Express, 6, 056502 (2013).